# -*- coding: utf-8 -*-
# !/usb/bin/env python

from __future__ import print_function

import sys
from subprocess import PIPE, Popen

# change those symbols to whatever you prefer
symbols = {'ahead of': '↑', 'behind': '↓', 'prehash': ':'}
gitsym = Popen(['git', 'symbolic-ref', 'HEAD'], stdout=PIPE, stderr=PIPE)
branch, error = gitsym.communicate()
error_string = error.decode('utf-8')
if 'fatal: Not a git repository' in error_string:
    sys.exit(0)
branch = branch.strip()[11:]
res, err = Popen(['git', 'diff', '--name-status'],
                 stdout=PIPE, stderr=PIPE).communicate()
err_string = err.decode('utf-8')
if 'fatal' in err_string:
    sys.exit(0)
changed_files = [namestat[0] for namestat in res.splitlines()]
staged_files = [namestat[0] for namestat in Popen(
    ['git', 'diff', '--staged', '--name-status'], stdout=PIPE).communicate()[0].splitlines()]
nb_changed = len(changed_files) - changed_files.count('U')
nb_U = staged_files.count('U')
nb_staged = len(staged_files) - nb_U
staged = str(nb_staged)
conflicts = str(nb_U)
changed = str(nb_changed)
nb_untracked = len(Popen(['git', 'ls-files', '--others',
                          '--exclude-standard'], stdout=PIPE).communicate()[0].splitlines())
untracked = str(nb_untracked)
if not nb_changed and not nb_staged and not nb_U and not nb_untracked:
    clean = '1'
else:
    clean = '0'
remote = ''
if not branch:  # not on any branch
    branch = symbols[
        'prehash'] + Popen(['git', 'rev-parse', '--short', 'HEAD'], stdout=PIPE).communicate()[0][:-1]
else:
    remote_name = Popen(['git', 'config', 'branch.%s.remote' %
                         branch], stdout=PIPE).communicate()[0].strip()
    if remote_name:
        merge_name = Popen(['git', 'config', 'branch.%s.merge' %
                            branch], stdout=PIPE).communicate()[0].strip()
        if remote_name == '.':  # local
            remote_ref = merge_name
        else:
            remote_ref = 'refs/remotes/%s/%s' % (remote_name, merge_name[11:])
        revgit = Popen(['git', 'rev-list', '--left-right',
                        '%s...HEAD' % remote_ref], stdout=PIPE, stderr=PIPE)
        revlist = revgit.communicate()[0]
        if revgit.poll():  # fallback to local
            revlist = Popen(['git', 'rev-list', '--left-right', '%s...HEAD' %
                             merge_name], stdout=PIPE, stderr=PIPE).communicate()[0]
        behead = revlist.splitlines()
        ahead = len([x for x in behead if x[0] == '>'])
        behind = len(behead) - ahead
        if behind:
            remote += '%s%s' % (symbols['behind'], behind)
        if ahead:
            remote += '%s%s' % (symbols['ahead of'], ahead)
out = '\n'.join([
    str(branch),
    remote,
    staged,
    conflicts,
    changed,
    untracked,
    clean])
print(out)
